| 摘要 |
PURPOSE: To assuredly detect the missing of an affixing of a sealing film at a spout, and prevent a boring due to welding from generating by laminating a surface resin layer which is fused with the internal side of a container with a base layer consisting of a resin in-between, as an opaque layer, and a surface resin layer which comes into contact with a content, as a coloring layer. CONSTITUTION: For a container, blanks on which a spout is provided are formed of a laminated material of which the base material is a paper layer, and a container main body is formed by bending the blanks. When the container is formed, an external film 2 is welded so as to cover the peripheral edge of the spout. Also, a sealing film consists of a laminated material being constituted of a surface resin layer which is welded to the peripheral edge of the spout so as to cover the spout from the inside of the container, and welded to the inside of the container, as an opaque layer 3, and a surface resin layer which comes into contact with a content, as a coloring layer 5. Then, by sensing the color of the coloring layer 5, the missing of the affixing of the sealing film is assuredly inspected. Also, the heat of a heater when a plug is welded is not absorbed by the opaque layer 3 being exposed to the outside, and a boring due to a fusion of the sealing film is prevented from generating. |
